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Black Ops Auto Works is proud to offer the **K&N High-Flow Replacement Air Filter** as the premium drop-in upgrade for 2021–2026 Ford E-350 Super Duty models equipped with the 7.3L V8 gasoline engine. This washable and reusable panel filter features K&N’s signature layered, oiled cotton media for superior airflow and filtration, delivering increased horsepower and improved throttle response. Engineered to last the lifetime of your vehicle and backed by K&N’s famous No-Hassle Lifetime Limited Warranty, this filter is an excellent choice for work trucks, fleet vehicles, and performance-oriented E-350 builds.
Key Features
- High-Flow Design – Increases horsepower and acceleration.
- Panel Dimensions – 10.563 in. L x 10.125 in. W x 1.188 in. H.
- 1 x K&N High-Flow Replacement Air Filter.
- Easy Maintenance – Clean and re-oil with K&N Filter Care products.
- Designed specifically for 2021–2026 Ford E-350 Super Duty with the 7.3L V8 gasoline engine.
- Black Ops Auto Works is your trusted authority for premium K&N air filters and intake systems.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2021-2026 | Ford | E-350 Super Duty | Verify engine and application notes |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | 33-5138 |
| Product Type | Air Filters - Drop In |
| Fitment Type | Vehicle Specific |
| Condition | New |
What's Included
One new K&N air filters - drop in identified by manufacturer part number 33-5138. Hardware, adapters, clamps, hoses, filters, and service supplies are included only when stated for this exact product.
About K&N Engineering
K&N develops reusable air filtration, intake, oil filtration, fuel filtration, and related performance products for vehicle-specific and dimensional applications.
Related K&N Engineering Products
- Shop all K&N Engineering products
- K&N 20-21 Ford F250/F350 Super Duty 6.2/6.7/7.3L V8 Replacement Air Filter
- K&N 2017 Ford F250 Super Duty V8-6.7L DSL Replacement Drop In Air Filter
- K&N Replacement Panel Air Filter for 11-15 Ford F-250/F-350/F-450/F-550 Super Duty 6.7L V8 Diesel
Frequently Asked Questions
How do I confirm K&N 33-5138 fits my vehicle?
Match the year, make, and model in the fitment table, then confirm the engine, factory housing, sensor layout, emissions notes, and any application restrictions stated for this exact part.
Is K&N 33-5138 washable and reusable?
Serviceability depends on the exact media used for this part number. Follow the K&N cleaning and oiling directions for this filter and never apply oil to media specified as dry.
What should be checked after installing K&N 33-5138?
Verify seals, clamps, fasteners, hoses, sensors, wiring, and surrounding clearance as applicable. Check for leaks or contact, then follow the manufacturer service and reinspection schedule.
Installation Instructions
- Use the current K&N instructions for part number 33-5138 and follow all vehicle, product, and service precautions.
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